Locality:
United States, Wisconsin, Ozaukee, Saukville. Cedarburg Bog, Univ. of Wisconsin-Milwaukee Field Station, 3.5 mi. W of Saukville off Blue Goose Rd.
Habitat:
"...to left of fork." Dense tuft of erect wiry culms with 3 or 4 spikes per culm, mostly male; perigynia few, at tip or base of spike, ovate, flat on one side, margins ridged, beak serrulate.